Air quality in Paris is no secret thanks to high-flying tourist attraction with a green angle
Look! Up in the sky! It's... an air quality measurement system?
In Paris, the tethered balloon in the Parc Andre Citroen has been a fixture going up and down on the Paris skyline for almost 10 years. Manufactured by Aèrophile of France, the balloon provides visitors the opportunity to travel over 50 fee...